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高分辨力原子频标比对装置是采用时差法和频率差值倍增技术相结合的方法对待测信号进行频率稳定度的测量.测试结果表明该方案设计的合理性和先进性,其实际测量的附加频率不稳定度指标达到“,”High-precision Frequency Standard Comparator is a kind of instrument to measure frequency stability.It adopts the means of time interval difference and multiple frequency difference.Test results show that its actual frequency stability can be as high as 5.0E-14/1s.